Sudhakaran M., Kokila M., and Ravanachandar A. “Influence of Enzyme Activities on Stable Isotopes (δ13C and δ15N) and Nutrient Cycles in Semi-Arid Agricultural Soils”. Journal of the Indian Society of Soil Science 71, no. 2 (August 13, 2023): 150–158. Accessed October 26, 2025. https://epubs.icar.org.in/index.php/JISSS/article/view/140788.